What is the main setting in the novel, The Witch Elm?

The entirety of The Witch Elm occurs in an unnamed city in Ireland. The allusion to Howth Head (a peninsula near Dublin), however, heavily implies that the novel takes place in a suburb of Dublin or in Dublin itself. Irish history and culture are a significant backdrop for the narrative, as it relies heavily on the perhaps stereotypical theme of luck. Tana French also makes reference to Irish independence movements and other moments in Irish history (and European history more broadly) to contextualize Toby's experiences.